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daca x supra 2 = y supra 3 si z suora 5 si x+y+z =20 aflati x y z... REPEDE VA ROOOOG

Răspuns :

x/2=y/3=z/5          y=3x/2      z=5x/2
x+y+z=20
x+3x/2+5x/2=20
2x+3x+5x=40
10x=40
x=4
y=3x/2=3×4/2=6      
z=5x/2=5×4/2=10